CVE-2023-2437

UserPro <= 5.1.1 - Authentication Bypass to Administrator

9.8 CriticalPublic exploit

The UserPro plugin for WordPress is vulnerable to authentication bypass in versions up to, and including, 5.1.1. This is due to insufficient verification on the user being supplied during a Facebook login through the plugin. This makes it possible for unauthenticated attackers to log in as any existing user on the site, such as an administrator, if they have access to the email. An attacker can leverage CVE-2023-2448 and CVE-2023-2446 to get the user's email address to successfully exploit this vulnerability.

Attack profile

How easy it is to exploit

Attack vector: Network
Complexity: Low
Privileges needed: None
User interaction: None

What an attacker can affect

Confidentiality: High
Integrity: High
Availability: High

Exploit likelihood

6.75%Up 6.7 points since Nov 23, 2023

What each source reports

CVE List Score used 9.8

UserPro <= 5.1.1 - Authentication Bypass to Administrator

Record: CVE-2023-2437
CVSS 3.1: 9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness: CWE-288
Updated: 2026-11-02

EUVDEUVD-2023-33922 9.8

Record: EUVD-2023-33922
CVSS 3.1: 9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Updated: 2026-11-02

GitHub AdvisoriesGHSA-w6q9-w8cf-jw9p 9.8

The UserPro plugin for WordPress is vulnerable to authentication bypass in versions up to, and...

Record: GHSA-w6q9-w8cf-jw9p
CVSS 3.1: 9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness: CWE-287, CWE-288
Updated: 2026-11-02

NVD 9.8

Record: CVE-2023-2437
CVSS 3.1: 9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS 3.1: 8.1 HighCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness: CWE-288, CWE-287
Updated: 2026-11-02

Affected products

userproplugin userpro

Public exploits

Links only. Every CVE stores no exploit code.

Public exploits
Source	Link	Date
Nuclei	UserPro <= 5.1.1 - Authentication Bypass
PoC in GitHub	RxRCoder/CVE-2023-2437	2024-03-02

History

History
Recorded	Changed	Sources
Nov 2, 2026	first indexed	CVE List, EUVD, GitHub Advisories, Nuclei, NVD, PoC in GitHub

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2023-2437 is a critical vulnerability (CVSS 9.8) in Userproplugin Userpro, published November 22, 2023. Public exploit code exists. EPSS puts the chance of exploitation in the next 30 days at 6.75%, the 94th percentile. No source names a fixed version.